编写定时器 TIM2 驱动程序、定时器TIM2 中断配置程序和中断服务程序，实现LED 灯 12s 延时闪烁，画出定时器延时流程图。

好的，这个问题属于技术问题，我可以为您提供答案。以下是实现LED灯闪烁的代码：

#include "stm32f10x.h"

void TIM2_Configuration(void)
{
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  NVIC_InitTypeDef NVIC_InitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 24000 - 1;  // 24000 * 0.5ms = 12s
  TIM_TimeBaseStructure.TIM_Prescaler = 7199;    // 72MHz / 7200 = 10kHz
  TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

  /* TIM2 enable interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

  /* TIM2 enable counter */
  TIM_Cmd(TIM2, ENABLE);
}

void LED_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

  /* Configure PC13 in output push-pull mode */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);
}

int main(void)
{
  /* Configure TIM2 and LED */
  TIM2_Configuration();
  LED_Configuration();

  while(1);
}

void TIM2_IRQHandler(void)
{
  if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
  {
    /* Toggle LED */
    GPIO_WriteBit(GPIOC, GPIO_Pin_13, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_13)));

    TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
  }
}

定时器的中断处理函数如下：

void TIM2_IRQHandler(void)
{
  if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
  {
    /* Toggle LED */
    GPIO_WriteBit(GPIOC, GPIO_Pin_13, (BitAction)(1 - GPIO_ReadOutputDataBit(GPIOC, GPIO_Pin_13)));

    TIM_ClearITPendingBit(TIM2, TIM_IT_Update);
  }
}

定时器的延时流程图如下：

希望能回答您的问题，如有需要请随时联系我。